Classic Widgets
Restore the classic (non-block) Widgets screen.
Where to find it
SiteNivo → Settings → General → Classic Widgets
How to use
1.
Enable Classic Widgets and Save Changes.
2.
Open Appearance → Widgets — the classic UI returns via WordPress’s use_widgets_block_editor filter.
Notes
Does not convert existing block-based widget content automatically — review sidebars after switching.